Railway-car truck.



-No. 856,626. PATENTED JUNE 11, 1907.

H. H. DREW.

RAILWAY GAR TRUCK.

APPLICATION FILED MAR. 25, 1901.

MM 4 jfil j W- UNITED STATES PATENT oF ioE.

HERBERT H. DREW, OF WATERLOO, WISCONSIN, ASSIGNOR OF ONE-HALF TO EDWIN M. SNOW, OF WATERLOO, WISCONSIN.

RAILWAY-"CAR TRUCK.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed March 25,1907. Serial No. 364,236.

-State of Wisconsin, have invented certain new and useful Improvements in Railway- Car Trucks; and I do hereby declare that the following is a full, clear, and exact description thereof. a

The improvements consist in what is herein shown, described and claimed; the object of the invention being to provide railway-car trucks of common knowledge with simple, economical running-gear designed to automatically compensate for differences in the radius of track-curves, thus reducing friction and preventing spread of track-rails.

Figure 1 of the accompanyin drawings represents a plan view, partly in horizontal section, of a fragment of a railway-car truck having running-gear in accordance with my invention, the view being indicated by lines 11 in the figure next in order, and Figs. 2 and 3 sectional views indicated by lines 22 and 33 respectively in Fig. 1.

Referring by letter to the drawings, A'in- (licates the framework of a railway-car truck as ordinarily constructed, B the journalboxes and C the body-bolster of same. Each wheel D of the truck is fast on an independent short axle E, the inner end of which axle has play in an arched slot of a hanger F attached to cross-timbers of the truck-frame,

' and provision is had in the journal-boxes B to prevent cram ing of said axles, as by a convex fit of the rasses with the box covers, an instance of the same being well shown in Fi 2.

%Vhen the truck-wheels are running on the rails of a track-curve, the tendency of their flanges to bind against said rails results in an automatic compensating adjustment of said wheels and their axles, inasmuch as there is forward swing and tilt of one axle of each pair and rearward swing and tilt of the other axle of said pair, owing to the arched playslots provided in the hanger for said axles.

I-n pivotal connection with the han er aforesaid are paired arms G that normally in either direction and t abut stops with which said hanger is preferably provided, one arm being forward and the other rearward of an axle. The arms of each pair are coupled and spring-controlled to resist play of the corres onding short axle lius said axle and wheel therewith are held in normal position central of the hanger-slots until such time as the friction of the wheel-flange on a trackrail is sufiicient to overcome the power of the controlling sprin In the showing one of the arms Gin each pair is coupled to a casing I-I containin a spring I, and the companion arm is con ed to a rod J that plays in the casing and as a head in opposition to an end of the spring, the latter being under tension in said casing.

I claim:

1. A railway-car truck having each wheel thereof rovided with an independent short axle Wit which it is rigid, journal boxes for the axles, and hangers having arched slots in which the inner ends-of the axles are loosely supported, rovision being had to prevent cram ing 0 said axles incidental to play of their inner ends in the han er-slots.

2. A railway-oar truck aving each wheel thereof rovided with an independent short axle wit which it is rigid, journal-boxes for the axles, hangers having arched slots in which the inner ends of the axles are loosely supported, fprovision being had to prevent cramping 0 said axles incidental to play of their inner ends in the hanger-slots, and coupled spring-controlled arms arranged in pivotal connection with the hangers to oppose each axle in opposite directions and thereby resist movement of same out of normal position central of the corresponding hanger-slot.

In testimony that I claim the foregoing I have hereunto set my hand at Waterloo in the county of Jefferson and State of Wisconsin in the presence of two witnesses.

HERBERT H. DBEW.

Witnesses RAY C. TWINING, E. M SNow. 

